It's really a human story. He'd been clean for twenty years. It seems he hadn't been exposed to those vices until he began doing Broadway. Theater culture isn't Prius clean. That's how he ended up back on heroin.

Julie D'Aubigny was a 17th-century bisexual French opera singer and fencing master who killed or wounded at least ten men in life-or-death duels, performed nightly shows on the biggest and most highly-respected opera stage in the world, and once took the Holy Orders just so that she could sneak into a convent and bang a nun. If nothing in that sentence at least marginally interests you, I have no idea why you're visiting this website.